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Reports instantiations of <code>java.util.Set</code> objects whose content types are enumerated classes. Such <code>Set</code> objects
can be replaced with <code>java.util.EnumSet</code> objects.
<p>
  <code>EnumSet</code> implementations can be much more efficient compared to
  other sets, as the underlying data structure is a bit vector. Use the quick-fix to replace the initializer with a call to
  <code>EnumSet.noneOf()</code>. This quick-fix is not available when the type of the variable is a sub-class of <code>Set</code>.
</p>
<p><b>Example:</b></p>
<pre><code>
  enum MyEnum { FOO, BAR; }

  Set&lt;MyEnum&gt; enums = new HashSet&lt;MyEnum&gt;();
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  enum MyEnum { FOO, BAR; }

  Set&lt;MyEnum&gt; enums = EnumSet.noneOf(MyEnum.class);
</code></pre>
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